Electric Wire with 180-220 mm² Conductor for Low-Temperature Flexibility
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Solution Overview
Problem
Thicker electric wires/cables are rigid and difficult to bend, leading to potential damage and performance deterioration, especially in narrow spaces and low-temperature environments, where they may require a larger bending radius and are prone to cracking.
Innovation Solution
An electric wire with a conductor cross-sectional area of 180-220 mm², featuring a conductor with strands of oxygen-free copper, an insulation and sheath made from a chlorinated polyethylene and polyolefin resin composition with specific hardness and flame retardant properties, allowing for improved flexibility and low-temperature bending without cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wire thickness is increased, then the mechanical strength is improved, but the flexibility deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the cross-sectional area of the conductor to a specific range (180-220 mm²) and controlling the deflection amount (≥180 mm) to achieve the desired balance between strength and flexibility. This quantitative parameter optimization allows the wire to maintain adequate mechanical strength while improving flexibility for easier installation.
2Strength
If the wire thickness is increased, then the mechanical strength is improved, but the bendability at low temperature deteriorates
Solution Approach 1:
The patent uses parameter changes by specifying the deflection amount (≥180 mm) as a key parameter to control the wire's bending characteristics. This parameter control ensures that even at low temperatures (−40°C), the wire can be bent without cracking or breaking, thereby improving low-temperature bending performance while maintaining mechanical strength.
3Strength
If the allowable bending radius is increased, then the mechanical strength is improved, but the wiring space requirement increases
Solution Approach 1:
The patent applies parameter changes by controlling the deflection amount (≥180 mm) and conductor cross-sectional area (180-220 mm²) to optimize the balance between mechanical strength and bending radius. This allows the wire to have adequate strength while reducing the required wiring space through improved flexibility.
Data Source
AI summary
An electric wire includes a conductor having a cross-sectional area of not less than 180 mm2 and not more than 220 mm2, an insulation provided so as to cover the outer periphery of the conductor, and a wire sheath provided so as to cover the outer periphery of the insulation. The amount of deflection is not less than 180 mm when, at 23° C., one end of the electric wire is fixed to a fixture table so that another end horizontally protrudes 400 mm from the fixture table and a weight of 2 kg is attached to the other end, and cracks and breaks do not occur when wound with a bending diameter of three times the diameter at −40° C.